/*
* maskMoney plugin for jQuery
* http://plentz.github.com/jquery-maskmoney/
* version: 2.1.1
* Licensed under the MIT license
*/
;(function($) {
if(!$.browser){
$.browser = {};
$.browser.mozilla = /mozilla/.test(navigator.userAgent.toLowerCase()) && !/webkit/.test(navigator.userAgent.toLowerCase());
$.browser.webkit = /webkit/.test(navigator.userAgent.toLowerCase());
$.browser.opera = /opera/.test(navigator.userAgent.toLowerCase());
$.browser.msie = /msie/.test(navigator.userAgent.toLowerCase());
}

var methods = {
destroy : function(){
var input = $(this);
input.unbind('.maskMoney');

if ($.browser.msie) {
this.onpaste = null;
}
return this;
},

mask : function(){
return this.trigger('mask');
},

init : function(settings) {
settings = $.extend({
symbol: '',
symbolStay: false,
thousands: ',',
decimal: '.',
precision: 2,
defaultZero: true,
allowZero: false,
allowNegative: false
}, settings);

return this.each(function() {
var input = $(this);
var dirty = false;

function markAsDirty() {
dirty = true;
}

function clearDirt(){
dirty = false;
}

function keypressEvent(e) {
e = e || window.event;
var k = e.which || e.charCode || e.keyCode;
if (k == undefined) return false; //needed to handle an IE "special" event
if (k < 48 || k > 57) { // any key except the numbers 0-9
if (k == 45) { // -(minus) key
markAsDirty();
input.val(changeSign(input));
return false;
} else if (k == 43) { // +(plus) key
markAsDirty();
input.val(input.val().replace('-',''));
return false;
} else if (k == 13 || k == 9) { // enter key or tab key
if(dirty){
clearDirt();
$(this).change();
}
return true;
} else if ($.browser.mozilla && (k == 37 || k == 39) && e.charCode == 0) {
// needed for left arrow key or right arrow key with firefox
// the charCode part is to avoid allowing '%'(e.charCode 0, e.keyCode 37)
return true;
} else { // any other key with keycode less than 48 and greater than 57
preventDefault(e);
return true;
}
} else if (input.val().length >= input.attr('maxlength')) {
return false;
} else {
preventDefault(e);

var key = String.fromCharCode(k);
var x = input.get(0);
var selection = getInputSelection(x);
var startPos = selection.start;
var endPos = selection.end;
x.value = x.value.substring(0, startPos) + key + x.value.substring(endPos, x.value.length);
maskAndPosition(x, startPos + 1);
markAsDirty();
return false;
}
}

function keydownEvent(e) {
e = e||window.event;
var k = e.which || e.charCode || e.keyCode;
if (k == undefined) return false; //needed to handle an IE "special" event

var x = input.get(0);
var selection = getInputSelection(x);
var startPos = selection.start;
var endPos = selection.end;

if (k==8) { // backspace key
preventDefault(e);

if(startPos == endPos){
// Remove single character
x.value = x.value.substring(0, startPos - 1) + x.value.substring(endPos, x.value.length);
startPos = startPos - 1;
} else {
// Remove multiple characters
x.value = x.value.substring(0, startPos) + x.value.substring(endPos, x.value.length);
}
maskAndPosition(x, startPos);
markAsDirty();
return false;
} else if (k==9) { // tab key
if(dirty) {
$(this).change();
clearDirt();
}
return true;
} else if ( k==46 || k==63272 ) { // delete key (with special case for safari)
preventDefault(e);
if(x.selectionStart == x.selectionEnd){
// Remove single character
x.value = x.value.substring(0, startPos) + x.value.substring(endPos + 1, x.value.length);
} else {
//Remove multiple characters
x.value = x.value.substring(0, startPos) + x.value.substring(endPos, x.value.length);
}
maskAndPosition(x, startPos);
markAsDirty();
return false;
} else { // any other key
return true;
}
}

function focusEvent(e) {
var mask = getDefaultMask();
if (input.val() == mask) {
input.val('');
} else if (input.val()=='' && settings.defaultZero) {
input.val(setSymbol(mask));
} else {
input.val(setSymbol(input.val()));
}
if (this.createTextRange) {
var textRange = this.createTextRange();
textRange.collapse(false); // set the cursor at the end of the input
textRange.select();
}
}

function blurEvent(e) {
if ($.browser.msie) {
keypressEvent(e);
}

if (input.val() == '' || input.val() == setSymbol(getDefaultMask()) || input.val() == settings.symbol) {
if(!settings.allowZero){
input.val('');
} else if (!settings.symbolStay){
input.val(getDefaultMask());
} else {
input.val(setSymbol(getDefaultMask()));
}
} else {
if (!settings.symbolStay){
input.val(input.val().replace(settings.symbol,''));
} else if (settings.symbolStay && input.val() == settings.symbol){
input.val(setSymbol(getDefaultMask()));
}
}
}

function preventDefault(e) {
if (e.preventDefault) { //standard browsers
e.preventDefault();
} else { // old internet explorer
e.returnValue = false
}
}

function maskAndPosition(x, startPos) {
var originalLen = input.val().length;
input.val(maskValue(x.value));
var newLen = input.val().length;
startPos = startPos - (originalLen - newLen);
setCursorPosition(input, startPos);
}

function mask(){
var value = input.val();
input.val(maskValue(value));
}

function maskValue(v) {
v = v.replace(settings.symbol, '');

var strCheck = '0123456789';
var len = v.length;
var a = '', t = '', neg='';

if(len != 0 && v.charAt(0)=='-'){
v = v.replace('-','');
if(settings.allowNegative){
neg = '-';
}
}

if (len==0) {
if (!settings.defaultZero) return t;
t = '0.00';
}

for (var i = 0; i<len; i++) {
if ((v.charAt(i)!='0') && (v.charAt(i)!=settings.decimal)) break;
}

for (; i < len; i++) {
if (strCheck.indexOf(v.charAt(i))!=-1) a+= v.charAt(i);
}
var n = parseFloat(a);

n = isNaN(n) ? 0 : n/Math.pow(10,settings.precision);
t = n.toFixed(settings.precision);

i = settings.precision == 0 ? 0 : 1;
var p, d = (t=t.split('.'))[i].substr(0,settings.precision);
for (p = (t=t[0]).length; (p-=3)>=1;) {
t = t.substr(0,p)+settings.thousands+t.substr(p);
}

return (settings.precision>0)
? setSymbol(neg+t+settings.decimal+d+Array((settings.precision+1)-d.length).join(0))
: setSymbol(neg+t);
}

function getDefaultMask() {
var n = parseFloat('0')/Math.pow(10,settings.precision);
return (n.toFixed(settings.precision)).replace(new RegExp('\\.','g'),settings.decimal);
}

function setSymbol(value){
if (settings.symbol != ''){
var operator = '';
if(value.length != 0 && value.charAt(0) == '-'){
value = value.replace('-', '');
operator = '-';
}

if(value.substr(0, settings.symbol.length) != settings.symbol){
value = operator + settings.symbol + value;
}
}
return value;
}

function changeSign(i){
if (settings.allowNegative) {
var vic = i.val();
if (i.val()!='' && i.val().charAt(0)=='-'){
return i.val().replace('-','');
} else{
return '-'+i.val();
}
} else {
return i.val();
}
}

function setCursorPosition(input, pos) {
// I'm not sure if we need to jqueryfy input
$(input).each(function(index, elem) {
if (elem.setSelectionRange) {
elem.focus();
elem.setSelectionRange(pos, pos);
} else if (elem.createTextRange) {
var range = elem.createTextRange();
range.collapse(true);
range.moveEnd('character', pos);
range.moveStart('character', pos);
range.select();
}
});
return this;
};

function getInputSelection(el) {
var start = 0, end = 0, normalizedValue, range, textInputRange, len, endRange;

if (typeof el.selectionStart == "number" && typeof el.selectionEnd == "number") {
start = el.selectionStart;
end = el.selectionEnd;
} else {
range = document.selection.createRange();

if (range && range.parentElement() == el) {
len = el.value.length;
normalizedValue = el.value.replace(/\r\n/g, "\n");

// Create a working TextRange that lives only in the input
textInputRange = el.createTextRange();
textInputRange.moveToBookmark(range.getBookmark());

// Check if the start and end of the selection are at the very end
// of the input, since moveStart/moveEnd doesn't return what we want
// in those cases
endRange = el.createTextRange();
endRange.collapse(false);

if (textInputRange.compareEndPoints("StartToEnd", endRange) > -1) {
start = end = len;
} else {
start = -textInputRange.moveStart("character", -len);
start += normalizedValue.slice(0, start).split("\n").length - 1;

if (textInputRange.compareEndPoints("EndToEnd", endRange) > -1) {
end = len;
} else {
end = -textInputRange.moveEnd("character", -len);
end += normalizedValue.slice(0, end).split("\n").length - 1;
}
}
}
}

return {
start: start,
end: end
};
} // getInputSelection

if (!input.attr("readonly")){
input.unbind('.maskMoney');
input.bind('keypress.maskMoney', keypressEvent);
input.bind('keydown.maskMoney', keydownEvent);
input.bind('blur.maskMoney', blurEvent);
input.bind('focus.maskMoney', focusEvent);
input.bind('mask.maskMoney', mask);
}
})
}
}

$.fn.maskMoney = function(method) {
if ( methods[method] ) {
return methods[method].apply( this, Array.prototype.slice.call( arguments, 1 ));
} else if ( typeof method === 'object' || ! method ) {
return methods.init.apply( this, arguments );
} else {
$.error( 'Method ' + method + ' does not exist on jQuery.maskMoney' );
}
};
})(jQuery);